JFC (just for clarification) I don't see anything confusing in the Chehalis regs regarding kings and dates.

CHEHALIS RIVER(Grays Harbor/
Thurston/Lewis Co.) from mouth (Hwy.
101 Bridge in Aberdeen) to Hwy. 6
Bridge in town of Adna
From mouth (Hwy. 101) to
Black River
(317)
From Black River upstream
(315)
ALL SPECIES- selective gear rules. Aug. 16-Nov. 30: single-point barbless hooks required.
TROUT First Sat. in June-Apr. 15 Min. size 14". Daily limit 2.
Other Game Fish First Sat. in June-Apr. 15 Statewide min. size/daily limit.
SALMON May 1-June 30 Min. size 12". Daily limit 1.
SALMON Sept. 16-Sept. 30 Min. size 12". Daily limit 6. Up to 3 adults may be retained ofwhich only
2 may be wild COHO. Release CHINOOK and CHUM.
SALMON Oct. 1-Oct. 31 Min. size 12". Daily limit 6. Up to 3 adults may be retained ofwhich only
1 may be a CHINOOK and 2 may be wild COHO. Release CHUM.
SALMON Nov. 1-Nov. 30 Min. size 12". Daily limit 6. Up to 3 adults may be retained ofwhich only
2 may be wild COHO. Release CHINOOK and CHUM.
SALMON Dec. 1-Jan. 31 Min. size 12". Daily limit 6. Up to 2 adults may be retained ofwhich only
1 may be a wild COHO. Release CHINOOK and CHUM.
STURGEON Year-round Min. size 38" fork length. Max. size 54" fork length. Daily limit 1.
Fishing for STURGEON allowed 24 hours a day.